Iron Mountain shares owned by William Blair $ Company
Quarter-by-quarter ownership of Iron Mountain (IRM) shares owned by William Blair $ Company
from 13F filings
Historical chart of William Blair $ Company investment in Iron Mountain
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All positions including Iron Mountain held by William Blair $ Company consolidated in one spreadsheet with up to 7 years of data
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Quarterly reported holdings in Iron Mountain by William Blair $ Company
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $33M | 318k | 101.94 |
| 2025-06-30 | $32M | 314k | 102.57 |
| 2025-03-31 | $28M | 331k | 86.04 |
| 2024-12-31 | $35M | 335k | 105.11 |
| 2024-09-30 | $40M | 334k | 118.83 |
| 2024-06-30 | $31M | 348k | 89.62 |
| 2024-03-31 | $28M | 349k | 80.21 |
| 2023-12-31 | $24M | 339k | 69.98 |
| 2023-09-30 | $21M | 354k | 59.45 |
| 2023-06-30 | $20M | 353k | 56.82 |
| 2023-03-31 | $19M | 359k | 52.91 |
| 2022-12-31 | $18M | 362k | 49.85 |
| 2022-09-30 | $16M | 357k | 43.97 |
| 2022-06-30 | $13M | 275k | 48.69 |
| 2022-03-31 | $15M | 278k | 55.41 |
| 2021-12-31 | $14M | 270k | 52.33 |
| 2021-09-30 | $12M | 264k | 43.45 |
| 2021-06-30 | $11M | 255k | 42.32 |
| 2021-03-31 | $10M | 270k | 37.01 |
| 2020-12-31 | $9.8M | 333k | 29.48 |
| 2020-09-30 | $8.6M | 319k | 26.79 |
| 2020-06-30 | $7.2M | 276k | 26.10 |
| 2020-03-31 | $9.0M | 379k | 23.80 |
| 2019-12-31 | $12M | 372k | 31.87 |
| 2019-09-30 | $13M | 414k | 32.39 |
| 2019-06-30 | $13M | 416k | 31.30 |
| 2019-03-31 | $15M | 423k | 35.46 |
| 2018-12-31 | $13M | 390k | 32.41 |
| 2018-09-30 | $13M | 389k | 34.52 |
| 2018-06-30 | $13M | 374k | 35.01 |
| 2018-03-31 | $19M | 571k | 32.86 |
| 2017-12-31 | $33M | 864k | 37.73 |
| 2017-09-30 | $30M | 765k | 38.90 |
| 2017-06-30 | $26M | 759k | 34.36 |
| 2017-03-31 | $27M | 734k | 36.18 |
| 2016-12-31 | $24M | 745k | 32.48 |
| 2016-09-30 | $31M | 833k | 37.53 |
| 2016-06-30 | $36M | 896k | 39.83 |
| 2016-03-31 | $32M | 955k | 33.91 |
| 2015-12-31 | $26M | 955k | 27.01 |
| 2015-09-30 | $28M | 890k | 31.02 |
| 2015-06-30 | $29M | 924k | 31.00 |
| 2015-03-31 | $32M | 866k | 36.48 |
| 2014-12-31 | $19M | 502k | 38.66 |